move test/tmp directory creation to sync to avoid race to create directory which…

move test/tmp directory creation to sync to avoid race to create directory which will appear as'Error: done() called multiple times' - refs visionmedia/mocha#316

test/cache.test.js

@@ -3,8 +3,8 @@ var assert = require('assert');
 var helper = require('./support/helper');
 
 describe('cache', function() {
-    before(function(done) {
-        helper.ensureExists('test/tmp',done);
+    before(function() {
+        helper.ensureExists('test/tmp');
     });
 
     it('should cache Database objects while opening', function(done) {

test/null_error.test.js

@@ -7,11 +7,9 @@ describe('null error', function() {
     var db;
 
     before(function(done) {
-        helper.ensureExists('test/tmp',function(err) {
-            if (err) throw err;
-            helper.deleteFile(filename);
-            db = new sqlite3.Database(filename, done);
-        });
+        helper.ensureExists('test/tmp');
+        helper.deleteFile(filename);
+        db = new sqlite3.Database(filename, done);
     });
 
     it('should create a table', function(done) {

test/open_close.test.js

@@ -4,8 +4,8 @@ var fs = require('fs');
 var helper = require('./support/helper');
 
 describe('open/close', function() {
-    before(function(done) {
-        helper.ensureExists('test/tmp',done);
+    before(function() {
+        helper.ensureExists('test/tmp');
     });
 
     describe('open and close non-existant database', function() {

test/parallel_insert.test.js

@@ -6,9 +6,8 @@ describe('parallel', function() {
     var db;
     before(function(done) {
         helper.deleteFile('test/tmp/test_parallel_inserts.db');
-        helper.ensureExists('test/tmp',function(err){
-            db = new sqlite3.Database('test/tmp/test_parallel_inserts.db', done);
-        });
+        helper.ensureExists('test/tmp');
+        db = new sqlite3.Database('test/tmp/test_parallel_inserts.db', done);
     });
 
     var columns = [];

test/support/helper.js

 var assert = require('assert');
 var fs = require('fs');
-var pathExists = require('fs').exists || require('path').exists;
+var pathExists = require('fs').existsSync || require('path').existsSync;
 
 exports.deleteFile = function(name) {
     try {
@@ -13,14 +13,9 @@ exports.deleteFile = function(name) {
 };
 
 exports.ensureExists = function(name,cb) {
-    pathExists(name,function(exists) {
-        if (!exists) {
-            fs.mkdir(name,function(err) {
-                return cb(err);
-            });
-        }
-        return cb(null);
-    });
+    if (!pathExists(name)) {
+        fs.mkdirSync(name);
+    };
 }
 
 assert.fileDoesNotExist = function(name) {